Found this great site via a google search and I've got a question for you.

I currently have a 20user BES server which comprises 14 users in my company and 5 users from our sister company downstaires.

I want to create a new office infrastructure which will split us up into seperate domains. Unfortunatley the problem in doing this is the BES server that both companies use (because we're on the same Exchange server currently). When we give them their own Exchange server is there a way to have the BES connect to 2 seperate domains/Exchange servers to get email?